Manufacture of soluble condensation products



mire-o STATES PATENT-OFFICE.

ARTHUR IIUTTRINGHAUS AND LOUIS BLANGEY, OF MANNHEIM, GERMANY,v

ASSIGNORS, IBY MESNE ASSIGNMENTS, T0 BADISCHE ANILIN & SODA- IABRIK, OFLUDWIGSHAFEN-ON-THE-RHINE, IBAV'ARIA, GERMANY, A GOR- PORATION 018' THEGRAND IDUGHY OF IBADEN. V

MANUFACTURE OF SOLUBLE CONDENSATION PRODUCTS.

araeao.

Ito Drawing.

To all whom it may concern:

Be it known that'we, ARTHUR Lii'rrnmo- Hans and Louis BLANGEY, citizensof German and. the Swiss Republic, respectively, resi ing at Mannheim,Germany, have in- Vented new and useful Improvements in the Manufactureof Soluble Condensation Prodagent need not cause further sulfonation ofthe aromatic sulfonic acid employed. Condensation goes on at ordinarytemperature, in most cases, and after removing mineral acids, if stillpresent, or neutralizmg them,

a solution of valuable properties is obtained.

For example, solutions of basic dyestufi's are thereby precipitated, inparticular when suitable metal salts are present, and they are also veryadapted for tanning purposes. I In order to further illustrate theprocess, the following examples are given to which however the inventionis not limited. The parts are by wei ht.

100 parts of cel ulose are introduced, whilst cooling and stirring, into1590 arts of ordi-- nary concentrated sulfurlc aci of 65 or 66 degreesBaum. As soon as all is dissolved and the solution remains clear onbeing diluted with water, 192 parts of finely powdered naphthalene areadded, while avoiding too high a rise of temperature, and stirring iscontinued 'until all of the naphthalene is dissolved andnaphthalenesulfonic acid can no longer be found. Then pour into water,neutralize by means of milk of liine, seperate from the gypsum, and do ASpecification of Letters Eatent. Patented Apr. 18, 922. Applicationfiled November 8, 1920. Serial No. 422,725.

compose the calcium 'salt dissolved by means of sodlum carbonate in theusual way. On evaporating the filtrate, the sodium salt of thecondensation product remains as a brownish mass that is readily solublein water. The solution precipitates glue from its acidulated solutionand basic dyestuffs,

in particular when salts of certain metals,

such as aluminium sulfate, are present, to form finely dividedprecipitates very suitable for the manufacture of color lakes. The solidsodium salt prepared as described dissolves in concentrated sulfuricacid giving a brownish red or violet red coloration, and on heating in adry condition it gives of!" sulfur dioxid and na hthalenevapors.

In the above examp e, naphthalene may be replaced by other organiccompounds, at least bicyclic and free from hydroxyl groups, such forinstance as methyl-naphthalene, chlor-naphthalene, naphthalene-sulfonicacids, anthracene, phenanthrene, car- 'bazol and the like. Starch,dextrin, sugars ma be used instead of cellulose.

e claim: a i

1. The process of manufacturing watersoluble condensation products whichconsists in condensing an at least bicyclic organic compound free fromhydroxyl groups with a carbohydrate in the presence of a sulfonatingagent.

2. The process of manufacturing watersoluble condensation products whlchconsists in condensing napthalene, carbohydrate and sulfuric acid. v 3.The process of manufacturing watersoluble condensation roducts whichconsists in combining- 113.151 bohydrate dissolved in sulfuric acid.

4. As a new article of manufacture, a

condensation product resulting from the reaction between a bicyclicaromatic compplind 0 yfree fromhydroxyl groups. and a car drate in thepresence of a sulfonating-a ent, said pRJduct possessing at least onesul nic acid group and bein easily soluble in water and precipitating gue from its acid solutions.

thalene with a c'ar "5. As a-new article of manufacture, a walene andprecipitates glue from its acidu- ."ter-soluble condensation produ'ctresulting lated solutlons; from the reaction between naphthalene, a Intestimony whereof we have hereunto 10 carbohydrate and sulfuric acid,the sodium set our hands. 5 salt of which dissolves in sulfuric acid,giva l ing'a brownish or violet red coloration and ARTHUR LUTTRINGHAUS.

on heating in a dry state gives ofi naphtha- LOUIS BLANGEY.

